Aerial photography image calibration method for unmanned aerial vehicle suitable for plane measurement

Abstract

The invention discloses an aerial photography image calibration method for an unmanned aerial vehicle suitable for plane measurement. According to the method, firstly, an image calibration model is built, and whether any map is subjected to calibration or on-site aerial photography calibration is judged. If any map is judged to be subjected to calibration, the fine adjustment is carried out to complete calibration after the image calibration operation. If any any map is judged to be subjected to on-site aerial photography calibration, a photography image is collected and calibration parametersare recorded. After that, the automatically calibrating operation is carried out and preliminary calibration parameters are obtained. Meanwhile, whether primary calibration parameters meet the requirement or not is judged. If primary calibration parameters meet the requirement, the calibration is completed. If primary calibration parameters do not meet the requirement, the plane image correctionor the plane image fast calibration is carried out. After the plane image correction or the plane image fast calibration, the fine adjustment is carried out to complete calibration. The method is simpler, clearer and faster in imaging operation, so that the real-time unmanned aerial vehicle calibration and measurement can be achieved. The time cost is greatly saved. The fast calibration mode can be adopted, so that the map blind spot problem of image calibration can be compensated. The calibration efficiency and the user experience are greatly improved.

Description

technical field [0001] The invention relates to the field of image calibration, in particular to a method for calibrating aerial images of unmanned aerial vehicles suitable for plane measurement. Background technique [0002] Traditional surveying and mapping surveys mostly use professional surveying instruments such as GPS locators or total stations for field surveys. Although such surveying and mapping methods have high precision, they are difficult to operate and need to be on the spot to complete the survey work, which is inefficient. [0003] In recent years, with the development of unmanned aerial vehicle technology, more and more survey work has begun to integrate UAV aerial photography technology into it. With the mobility and intelligence of UAV, the measurement efficiency has been greatly improved. However, at present, the operation of UAV measurement technology still requires a professional team and equipment to carry out, which not only requires high technical re...

AI Technical Summary

Problems solved by technology

Although this method is applicable to any aerial pictures, it needs to provide the geographical coordinates of known points, and even use GPS locator to measure the known points on the spot to obtain the geographical coordinates, resulting in complicated implementation process, low efficiency, high technical requirements, and user poor experience

[0006] 2. Through professional image measurement software, several continuous associated images are geographically spliced ​​according to the aerial three-dimensional data of exposure points to achieve high-precision deviation correction. This method can splice several sub-aerial images into a whole picture, which is suitable for the production of large-area aerial maps. , but because image processing requires professional software and graphics workstations, the software and supporting graphics workstations are not only expensive, but most of the image stitching processing takes several hours to complete, and the calibration results cannot be obtained in real time and on the spot, making the efficiency low

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